Using binary time-series-cross-section analysis that covers 67 to 160 countries (per year) between 1955 and 2007, we examine the extent to which territorial self-governance arrangements (TSG) are an effective institutional approach to territory-centred conflict management. Unlike previous writings on the topic, we put particular emphasis on the question whether TSG might be a more effective conflict management tool when combined with a particular type of electoral system and form of government, and thus should be treated as part and parcel of a broader institutional ‘package’ when seeking to reduce the risk of territory-centred intrastate violence. We find robust empirical evidence that TSG on its own as well as in combination with a PR electoral system for the national legislature is an effective conflict management tool.